/* Specification Choice in Asset Pricing — site-wide styles.
   Token-level theming: light is the default, dark redefines the same tokens
   via prefers-color-scheme, and the explicit data-theme attribute (set by the
   header toggle, persisted in localStorage) wins in both directions. */
:root{
  --paper:#F7F8F5; --panel:#FFFFFF; --ink:#1B2422; --ink2:#4A5551; --ink3:#7C8781;
  --line:#DFE3DE; --accent:#0E7D6B; --accent-ink:#0A5F52; --madder:#A63D4E;
  --chip:#EEF1EC; --chip-on:#0E7D6B; --chip-on-ink:#F4FBF9;
  --shadow:0 1px 3px rgba(27,36,34,.08);
}
@media (prefers-color-scheme: dark){:root{
  --paper:#111615; --panel:#181F1D; --ink:#E5EBE7; --ink2:#AAB5AF; --ink3:#77827C;
  --line:#2A332F; --accent:#46B39C; --accent-ink:#7ACDBB; --madder:#D0798A;
  --chip:#212927; --chip-on:#2E8A77; --chip-on-ink:#0E1513;
  --shadow:0 1px 3px rgba(0,0,0,.4);
}}
:root[data-theme="dark"]{
  --paper:#111615; --panel:#181F1D; --ink:#E5EBE7; --ink2:#AAB5AF; --ink3:#77827C;
  --line:#2A332F; --accent:#46B39C; --accent-ink:#7ACDBB; --madder:#D0798A;
  --chip:#212927; --chip-on:#2E8A77; --chip-on-ink:#0E1513;
  --shadow:0 1px 3px rgba(0,0,0,.4);
}
:root[data-theme="light"]{
  --paper:#F7F8F5; --panel:#FFFFFF; --ink:#1B2422; --ink2:#4A5551; --ink3:#7C8781;
  --line:#DFE3DE; --accent:#0E7D6B; --accent-ink:#0A5F52; --madder:#A63D4E;
  --chip:#EEF1EC; --chip-on:#0E7D6B; --chip-on-ink:#F4FBF9;
  --shadow:0 1px 3px rgba(27,36,34,.08);
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--paper);color:var(--ink);
  font:15px/1.55 Seravek,'Gill Sans Nova',Ubuntu,Calibri,'Segoe UI',sans-serif}
.serif{font-family:'Iowan Old Style','Palatino Linotype','Book Antiqua',Palatino,Georgia,serif}
.mono{font-family:ui-monospace,'Cascadia Mono','Segoe UI Mono',Consolas,monospace;
  font-variant-numeric:tabular-nums}
a{color:var(--accent-ink)}

/* ---------- header / nav ---------- */
.topbar{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap;
  padding:16px 28px 0;border-bottom:1px solid var(--line)}
.topbar .brand{font-size:17px;font-weight:600;text-decoration:none;color:var(--ink);
  margin-right:6px}
.topbar nav{display:flex;gap:2px;flex-wrap:wrap}
.topbar nav a{text-decoration:none;color:var(--ink2);font-size:13.5px;
  padding:6px 12px 10px;border-bottom:2px solid transparent}
.topbar nav a.here{color:var(--accent-ink);border-bottom-color:var(--accent);font-weight:600}
.topbar nav a:hover{color:var(--ink)}
.topbar .spacer{flex:1}
.themebtn{background:none;border:1px solid var(--line);border-radius:6px;
  color:var(--ink2);padding:3px 10px;cursor:pointer;font-size:12px;margin-bottom:8px}
.pagehead{padding:22px 28px 16px;border-bottom:1px solid var(--line)}
.pagehead h1{margin:0;font-size:25px;font-weight:600;letter-spacing:.2px;text-wrap:balance}
.pagehead .sub{color:var(--ink2);margin-top:6px;text-align:justify}
.badge{display:inline-block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent-ink);border:1px solid var(--accent);border-radius:3px;
  padding:1px 8px;margin-left:10px;vertical-align:3px}

/* ---------- explorer layout ---------- */
.wrap{display:grid;grid-template-columns:308px 1fr;gap:0;min-height:70vh}
@media (max-width:900px){.wrap{grid-template-columns:1fr}}
aside.knobbar{border-right:1px solid var(--line);padding:16px 18px 40px;
  max-height:calc(100vh - 120px);overflow-y:auto}
aside.knobbar h2{font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink3);margin:4px 0 10px}
.knob{margin-bottom:13px}
.knob .kname{font-size:12.5px;font-weight:600;color:var(--ink2);margin-bottom:5px}
.chips{display:flex;flex-wrap:wrap;gap:5px}
.chip{cursor:pointer;user-select:none;font-size:12px;padding:2.5px 9px;border-radius:11px;
  background:var(--chip);color:var(--ink2);border:1px solid transparent;
  transition:background .12s ease}
.chip.on{background:var(--chip-on);color:var(--chip-on-ink);font-weight:600}
.chip:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
main.explore{padding:18px 26px 48px;min-width:0}

.presets{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.preset{cursor:pointer;background:var(--panel);border:1px solid var(--line);border-radius:6px;
  padding:7px 12px;box-shadow:var(--shadow);max-width:230px}
.preset .cite{font-weight:600;font-size:13.5px}
.preset .desc{font-size:11.5px;color:var(--ink3);line-height:1.35;margin-top:2px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.preset.active{border-color:var(--accent);outline:1px solid var(--accent)}
.preset.reset .cite{color:var(--accent-ink)}
.presetnote{font-size:12.5px;color:var(--ink2);border-left:3px solid var(--accent);
  padding:6px 10px;margin:-6px 0 14px;background:var(--panel);border-radius:0 6px 6px 0}

.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:10px;
  margin-bottom:14px}
.tile{background:var(--panel);border:1px solid var(--line);border-radius:6px;
  padding:10px 13px;box-shadow:var(--shadow)}
.tile .v{font-size:23px;font-weight:650}
.tile .l{font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink3);
  margin-top:2px}

.controls{display:flex;align-items:center;gap:14px;margin:2px 0 8px;flex-wrap:wrap}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg button{border:0;background:var(--panel);color:var(--ink2);padding:4px 12px;
  font-size:12.5px;cursor:pointer}
.seg button.on{background:var(--accent);color:var(--chip-on-ink);font-weight:600}
.legend{display:flex;gap:14px;font-size:12px;color:var(--ink2);align-items:center;
  flex-wrap:wrap}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:5px;
  vertical-align:-1px}

.chartbox{position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;box-shadow:var(--shadow);padding:6px}
.chartbox canvas{display:block;width:100%;height:430px}
.tipbox{position:absolute;pointer-events:none;display:none;background:var(--ink);
  color:var(--paper);border-radius:6px;padding:9px 11px;font-size:11.5px;line-height:1.45;
  max-width:290px;z-index:5;box-shadow:0 4px 14px rgba(0,0,0,.25)}
.tipbox .big{font-size:14px;font-weight:650}
.tipbox .rec{color:color-mix(in oklab, var(--paper) 78%, var(--ink));margin-top:4px}

/* ---------- compare panel ---------- */
.cmpbox{margin-top:14px;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;box-shadow:var(--shadow);padding:14px 16px}
.cmpbox h3{margin:0 0 8px;font-size:13px;letter-spacing:.07em;text-transform:uppercase;
  color:var(--ink3)}
.cmpbox table{border-collapse:collapse;width:100%;font-size:12.5px}
.cmpbox td,.cmpbox th{padding:3.5px 10px 3.5px 0;text-align:left;vertical-align:top}
.cmpbox th{color:var(--ink3);font-weight:600;font-size:11.5px;letter-spacing:.05em;
  text-transform:uppercase;border-bottom:1px solid var(--line)}
.cmpbox tr.diff td{color:var(--ink);font-weight:600}
.cmpbox tr.diff td:first-child{border-left:3px solid var(--accent);padding-left:8px}
.pinlab{display:inline-block;width:17px;height:17px;border-radius:50%;text-align:center;
  line-height:17px;font-size:11px;font-weight:700;color:var(--chip-on-ink);
  background:var(--accent);margin-right:6px}
.pinlab.b{background:var(--madder)}
.clearbtn{float:right;background:none;border:1px solid var(--line);border-radius:6px;
  color:var(--ink2);padding:2px 10px;cursor:pointer;font-size:12px}
.unpin{background:none;border:1px solid var(--line);border-radius:5px;
  color:var(--ink2);padding:1px 8px;margin-left:8px;cursor:pointer;font-size:11px}
.unpin:hover{border-color:var(--madder);color:var(--madder)}
.cmpbox .same{color:var(--ink3);font-size:12px;margin-top:6px}

.papernote{margin-top:14px;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;box-shadow:var(--shadow);padding:16px 18px}
.papernote .pn-title{font-weight:600;font-size:14.5px;margin-bottom:12px}
.papernote .pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px}
@media (max-width:760px){.papernote .pn-grid{grid-template-columns:1fr}}
.papernote h4{margin:0 0 4px;font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--ink3)}
.papernote p{margin:0 0 6px;font-size:13px;line-height:1.55;color:var(--ink2);
  text-align:justify;hyphens:auto}
.papernote .pn-pins{color:var(--ink3);font-size:12px}

/* ---------- theme menu ---------- */
.theme-menu{position:absolute;z-index:60;display:none;flex-direction:column;
  min-width:150px;padding:4px;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;box-shadow:0 6px 22px rgba(0,0,0,.25)}
.theme-menu.on{display:flex}
.theme-menu button{text-align:left;background:none;border:0;color:var(--ink);
  padding:7px 12px;border-radius:6px;font:13px/1.3 inherit;font-family:inherit;
  cursor:pointer}
.theme-menu button:hover{background:var(--chip)}
.theme-menu button.on{color:var(--accent-ink);font-weight:600}
.theme-menu button.on::after{content:" ¹3"}

/* ---------- loading overlay ---------- */
.loadwrap{padding:60px 28px;text-align:center;color:var(--ink2)}
.loadbar{width:min(420px,80%);height:6px;border-radius:3px;background:var(--chip);
  margin:14px auto 8px;overflow:hidden}
.loadbar>div{height:100%;width:0%;background:var(--accent);transition:width .15s ease}
.loadnote{font-size:12.5px;color:var(--ink3)}

/* ---------- landing ---------- */
.hero{padding:56px 28px 30px;max-width:960px;margin:0 auto}
.hero h1{font-size:clamp(28px,4.5vw,44px);margin:0 0 14px;font-weight:600;
  letter-spacing:.2px}
.hero .byline{margin:8px 0 0;font-size:14.5px;color:var(--ink2)}
.hero .subtitle{margin:14px 0 0;font-size:18.5px;line-height:1.5;color:var(--ink2);
  max-width:72ch}
.hero .center{text-align:center}
.hero .subtitle.center{margin-left:auto;margin-right:auto}
.authors{display:grid;grid-template-columns:1fr 1fr;gap:34px;margin:26px 0 30px;
  text-align:center}
.author img{width:190px;height:190px;border-radius:50%;object-fit:cover;
  display:block;margin:0 auto 14px;background:var(--chip)}
.author .a-name{font-size:19px;font-weight:650;color:var(--ink);line-height:1.3}
.author .a-role{font-size:13.5px;color:var(--ink2);margin-top:4px;line-height:1.4}
.author .a-aff{font-size:12.5px;color:var(--ink3);margin-top:4px;line-height:1.4}
@media (max-width:700px){.authors{grid-template-columns:1fr;gap:28px}}
.hero .thesis{font-size:18px;color:var(--ink2);line-height:1.62;margin:16px 0 0;
  text-align:justify}
.bignums{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;
  max-width:960px;margin:26px auto 0;padding:0 28px}
.bignum{background:var(--panel);border:1px solid var(--line);border-radius:8px;
  padding:18px 20px;box-shadow:var(--shadow)}
.bignum .v{font-size:32px;font-weight:650;color:var(--accent-ink)}
.bignum .l{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink3);
  margin-top:4px}
.bignum .d{font-size:13px;color:var(--ink2);margin-top:8px;line-height:1.45;
  text-align:justify;hyphens:auto}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;
  max-width:960px;margin:34px auto;padding:0 28px}
.card{display:block;text-decoration:none;color:var(--ink);background:var(--panel);
  border:1px solid var(--line);border-radius:8px;padding:18px 20px;box-shadow:var(--shadow)}
.card:hover{border-color:var(--accent)}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;font-size:13.5px;color:var(--ink2);line-height:1.5;
  text-align:justify;hyphens:auto}
.card .go{display:inline-block;margin-top:10px;color:var(--accent-ink);font-weight:600;
  font-size:13px}
.prose{max-width:960px;margin:0 auto;padding:10px 28px 40px;color:var(--ink2)}
.prose h2{color:var(--ink);font-size:19px;margin-top:34px}
.prose p{text-align:justify;margin:10px 0 0}
.prose code{font-family:ui-monospace,Consolas,monospace;font-size:13px;
  background:var(--chip);padding:1px 5px;border-radius:4px}

footer.site{padding:16px 28px 34px;color:var(--ink3);font-size:12.5px;
  border-top:1px solid var(--line);text-align:justify}
footer.site b{color:var(--ink2)}
/* ---------- AI assistant: docked right panel ---------- */
.asst-tab{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:40;
  background:var(--accent);color:var(--chip-on-ink);border:0;border-radius:999px;
  padding:16px 24px;font:600 15.5px/1 inherit;font-family:inherit;cursor:pointer;
  letter-spacing:.02em;box-shadow:0 4px 18px rgba(0,0,0,.35)}
.asst-tab:hover{filter:brightness(1.06)}
.asst-tab.hide{display:none}
.asst{position:fixed;right:0;top:0;bottom:0;z-index:41;width:300px;display:none;
  flex-direction:column;background:var(--panel);border-left:1px solid var(--line)}
.asst.on{display:flex}
.asst-grip{position:absolute;left:-3px;top:0;bottom:0;width:8px;cursor:ew-resize;
  touch-action:none}
.asst-grip:hover{background:color-mix(in oklab, var(--accent) 30%, transparent)}
body.asst-open{padding-right:var(--asst-w,300px)}
@media (max-width:899px){
  .asst{width:min(340px,94vw) !important;box-shadow:0 8px 30px rgba(0,0,0,.3)}
  body.asst-open{padding-right:0}
  .asst-grip{display:none}
}
.asst-head{display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px;border-bottom:1px solid var(--line);font-weight:600;font-size:13px}
.asst-close{background:none;border:1px solid var(--line);border-radius:6px;
  color:var(--ink2);font-size:15px;line-height:1;padding:2px 9px;cursor:pointer}
.asst-msgs{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px}
.asst-m{max-width:88%;padding:8px 11px;border-radius:9px;font-size:13px;
  line-height:1.5;white-space:pre-wrap}
.asst-m.user{align-self:flex-end;background:var(--chip-on);color:var(--chip-on-ink)}
.asst-m.assistant{align-self:flex-start;background:var(--chip);color:var(--ink)}
.asst-form{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}
.asst-in{flex:1;background:var(--paper);color:var(--ink);border:1px solid var(--line);
  border-radius:7px;padding:8px 10px;font:13px/1.4 inherit;font-family:inherit}
.asst-in:focus-visible{outline:2px solid var(--accent)}
.asst-send{background:var(--accent);color:var(--chip-on-ink);border:0;border-radius:7px;
  padding:8px 14px;font:600 13px/1 inherit;font-family:inherit;cursor:pointer}
.asst-note{padding:0 12px 10px;font-size:10.5px;color:var(--ink3);line-height:1.4}
@media (prefers-reduced-motion: reduce){*{transition:none !important}}